zynq-common: Enable Bank/Extended address register support

Enabled SPI flash Bank/Extended address register support.

Bank/Extended address registers are used to access the flash
which has size > 16MiB in 3-byte addressing.

Signed-off-by: Jagan Teki <jteki@openedev.com>

include/configs/zynq-common.h

@@ -78,6 +78,7 @@
 # define CONFIG_SPI_FLASH_SPANSION
 # define CONFIG_SPI_FLASH_STMICRO
 # define CONFIG_SPI_FLASH_WINBOND
+# define CONFIG_SPI_FLASH_BAR
 # define CONFIG_CMD_SF
 #endif